Battery pack active equalization system based on super capacitor and working method thereof

A supercapacitor and active equalization technology, which is applied in charge equalization circuits, electric vehicles, battery circuit devices, etc., can solve the problems of poor equalization effect and low equalization efficiency, and achieve the effects of convenient testing, improved equalization efficiency, and strong practicability

Pending Publication Date: 2019-07-05
成都极空科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of poor equalization effect and low equalization efficiency existing in the existing active equalization technology, the purpose of the present invention is to provide a battery pack active equalization system based on a supercapacitor and its working method

Method used

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  • Battery pack active equalization system based on super capacitor and working method thereof
  • Battery pack active equalization system based on super capacitor and working method thereof
  • Battery pack active equalization system based on super capacitor and working method thereof

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Embodiment 1

[0048] Such as Figure 1-5 As shown, the supercapacitor-based battery pack active balancing system provided in this embodiment includes a battery pack (BAT1-n), a battery voltage acquisition module, a first battery gating matrix, a control module, a bidirectional DC-DC constant A current charging and discharging module and a supercapacitor HC, wherein the battery pack (BAT1-n) is composed of n secondary batteries connected in series, and the battery voltage acquisition module is used to obtain the positive voltage of each secondary battery in the battery pack. The voltage value between the negative poles, the first battery gating matrix includes n+1 battery connection terminals, which are electrically connected to the positive poles / negative poles of the secondary batteries in the battery pack in one-to-one correspondence, and are used to make the Any secondary battery in the battery pack can be individually connected in parallel with the first positive connection terminal PD1...

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Abstract

The invention relates to the technical field of battery management, and discloses a battery pack active equalization system based on a super capacitor and a working method thereof. According to the invention, the super capacitor can be used as an electric quantity temporary storage medium, and a high-voltage secondary battery is selected to carry out the constant-current charging of the super capacitor, and thereafter a medium-low voltage secondary battery is selected to receive constant-current discharging from the super capacitor, and therefore the object of active equalization of the battery pack is realized, the electric quantity is ensured to be transferred from high to low each time, invalid charging-discharging circulation is prevented, and the then service lifetime of the battery is hardly affected, and in addition, the DC-DC constant-current charging-discharging technology can be used for ensuring the constancy of equalized current, so that the equalization capacity is not affected by the small pressure difference between the batteries. In addition, only two electric quantity transferring processes are required to complete the equalization of the voltage of the primary battery from high to low, and the equalization efficiency is not affected by the distance between the batteries, and therefore the equalization efficiency is greatly improved, namely the equalization efficiency is about 0.9 regardless of the number of the single batteries.

Description

technical field [0001] The invention belongs to the technical field of battery management, and in particular relates to an active equalization system of a battery pack based on a supercapacitor and a working method thereof. Background technique [0002] In battery management systems in fields such as electric vehicles, sightseeing cars, electric motorcycles, solar energy storage, base station energy storage, and high-power UPS (Uninterruptible Power System, uninterruptible power supply), battery balancing refers to the use of power electronics technology , to keep the secondary battery cell voltage or battery pack voltage deviation within the expected range, so as to ensure that each single cell maintains the same state during normal use, so as to avoid the occurrence of overcharge or overdischarge. Battery balancing is generally divided into two types: active balancing and passive balancing. Among them, the existing active balancing technologies mainly include: capacitive b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/34
CPCH02J7/0016H02J7/0019H02J7/345
Inventor 周俊张鹏
Owner 成都极空科技有限公司
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